kernel: Use NULL for pointers in some places.
[dragonfly.git] / sys / platform / pc64 / x86_64 / autoconf.c
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1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
c8fe38ae 3 * Copyright (c) 2008 The DragonFly Project.
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4 * All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * William Jolitz.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91
38 * $FreeBSD: src/sys/i386/i386/autoconf.c,v 1.146.2.2 2001/06/07 06:05:58 dd Exp $
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39 */
40
41/*
42 * Setup the system to run on the current machine.
43 *
44 * Configure() is called at boot time and initializes the vba
45 * device tables and the memory controller monitoring. Available
46 * devices are determined (from possibilities mentioned in ioconf.c),
47 * and the drivers are initialized.
48 */
49#include "opt_bootp.h"
50#include "opt_ffs.h"
51#include "opt_cd9660.h"
52#include "opt_nfs.h"
53#include "opt_nfsroot.h"
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54#include "opt_rootdevname.h"
55
56#include "use_isa.h"
57
58#include <sys/param.h>
59#include <sys/systm.h>
60#include <sys/bootmaj.h>
61#include <sys/bus.h>
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62#include <sys/conf.h>
63#include <sys/diskslice.h>
64#include <sys/reboot.h>
65#include <sys/kernel.h>
66#include <sys/malloc.h>
67#include <sys/mount.h>
68#include <sys/cons.h>
69#include <sys/thread.h>
70#include <sys/device.h>
71#include <sys/machintr.h>
72
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73#include <machine/bootinfo.h>
74#include <machine/md_var.h>
75#include <machine/smp.h>
76#include <machine_base/icu/icu.h>
d7f50089 77
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78#include <machine/pcb.h>
79#include <machine/pcb_ext.h>
d7f50089 80#include <machine/globaldata.h>
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81
82#if NISA > 0
83#include <bus/isa/isavar.h>
84
716a081c 85device_t isa_bus_device = NULL;
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86#endif
87
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88static void configure_first (void *);
89static void configure (void *);
90static void configure_final (void *);
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91
92#if defined(FFS) && defined(FFS_ROOT)
93static void setroot (void);
94#endif
95
96#if defined(NFS) && defined(NFS_ROOT)
97#if !defined(BOOTP_NFSROOT)
98static void pxe_setup_nfsdiskless(void);
99#endif
100#endif
101
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102SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
103/* SI_ORDER_SECOND is hookable */
104SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
105/* SI_ORDER_MIDDLE is hookable */
106SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
107
108cdev_t rootdev = NULL;
109cdev_t dumpdev = NULL;
110
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111/*
112 * Determine i/o configuration for a machine.
113 */
114static void
115configure_first(void *dummy)
116{
117}
118
119static void
120configure(void *dummy)
121{
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122 /*
123 * This will configure all devices, generally starting with the
124 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly
125 * dummies up the attach in order to delay legacy initialization
126 * until after all other busses/subsystems have had a chance
127 * at those resources.
128 */
129 root_bus_configure();
130
131#if NISA > 0
132 /*
133 * Explicitly probe and attach ISA last. The isa bus saves
134 * it's device node at attach time for us here.
135 */
136 if (isa_bus_device)
137 isa_probe_children(isa_bus_device);
138#endif
139
140 /*
141 * Allow lowering of the ipl to the lowest kernel level if we
142 * panic (or call tsleep() before clearing `cold'). No level is
143 * completely safe (since a panic may occur in a critical region
144 * at splhigh()), but we want at least bio interrupts to work.
145 */
146 safepri = TDPRI_KERN_USER;
147}
148
149static void
150configure_final(void *dummy)
151{
152 cninit_finish();
153
c8fe38ae 154 if (bootverbose) {
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155#if JG
156 /*
157 * Print out the BIOS's idea of the disk geometries.
158 */
bfc09ba0 159 int i;
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160 kprintf("BIOS Geometries:\n");
161 for (i = 0; i < N_BIOS_GEOM; i++) {
162 unsigned long bios_geom;
163 int max_cylinder, max_head, max_sector;
164
165 bios_geom = bootinfo.bi_bios_geom[i];
166
167 /*
168 * XXX the bootstrap punts a 1200K floppy geometry
169 * when the get-disk-geometry interrupt fails. Skip
170 * drives that have this geometry.
171 */
172 if (bios_geom == 0x4f010f)
173 continue;
174
175 kprintf(" %x:%08lx ", i, bios_geom);
176 max_cylinder = bios_geom >> 16;
177 max_head = (bios_geom >> 8) & 0xff;
178 max_sector = bios_geom & 0xff;
179 kprintf(
180 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
181 max_cylinder, max_cylinder + 1,
182 max_head, max_head + 1,
183 max_sector, max_sector);
184 }
185 kprintf(" %d accounted for\n", bootinfo.bi_n_bios_used);
186
d7f50089 187 kprintf("Device configuration finished.\n");
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188#endif
189 }
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190}
191
192#ifdef BOOTP
193void bootpc_init(void);
194#endif
195/*
196 * Do legacy root filesystem discovery.
197 */
198void
199cpu_rootconf(void)
200{
201#ifdef BOOTP
202 bootpc_init();
203#endif
204#if defined(NFS) && defined(NFS_ROOT)
205#if !defined(BOOTP_NFSROOT)
206 pxe_setup_nfsdiskless();
207 if (nfs_diskless_valid)
208#endif
209 rootdevnames[0] = "nfs:";
210#endif
211#if defined(FFS) && defined(FFS_ROOT)
212 if (!rootdevnames[0])
213 setroot();
214#endif
215}
216SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
217
218u_long bootdev = 0; /* not a cdev_t - encoding is different */
219
220#if defined(FFS) && defined(FFS_ROOT)
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221#define FDMAJOR 2
222#define FDUNITSHIFT 6
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223
224/*
225 * The boot code uses old block device major numbers to pass bootdev to
226 * us. We have to translate these to character device majors because
227 * we don't have block devices any more.
228 */
229static int
230boot_translate_majdev(int bmajor)
231{
232 static int conv[] = { BOOTMAJOR_CONVARY };
233
c157ff7a 234 if (bmajor >= 0 && bmajor < NELEM(conv))
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235 return(conv[bmajor]);
236 return(-1);
237}
238
239/*
240 * Attempt to find the device from which we were booted.
241 * If we can do so, and not instructed not to do so,
242 * set rootdevs[] and rootdevnames[] to correspond to the
243 * boot device(s).
244 *
245 * This code survives in order to allow the system to be
246 * booted from legacy environments that do not correctly
247 * populate the kernel environment. There are significant
248 * restrictions on the bootability of the system in this
249 * situation; it can only be mounting root from a 'da'
250 * 'wd' or 'fd' device, and the root filesystem must be ufs.
251 */
252static void
253setroot(void)
254{
255 int majdev, mindev, unit, slice, part;
256 cdev_t newrootdev, dev;
257 char partname[2];
258 char *sname;
259
260 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
261 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
262 return;
263 }
264 majdev = boot_translate_majdev(B_TYPE(bootdev));
265 if (bootverbose) {
266 kprintf("bootdev: %08lx type=%ld unit=%ld "
267 "slice=%ld part=%ld major=%d\n",
268 bootdev, B_TYPE(bootdev), B_UNIT(bootdev),
269 B_SLICE(bootdev), B_PARTITION(bootdev), majdev);
270 }
271 dev = udev2dev(makeudev(majdev, 0), 0);
272 if (!dev_is_good(dev))
273 return;
274 unit = B_UNIT(bootdev);
275 slice = B_SLICE(bootdev);
276 if (slice == WHOLE_DISK_SLICE)
277 slice = COMPATIBILITY_SLICE;
278 if (slice < 0 || slice >= MAX_SLICES) {
279 kprintf("bad slice\n");
280 return;
281 }
282
283 part = B_PARTITION(bootdev);
284 mindev = dkmakeminor(unit, slice, part);
285 newrootdev = udev2dev(makeudev(majdev, mindev), 0);
286 if (!dev_is_good(newrootdev))
287 return;
288 sname = dsname(newrootdev, unit, slice, part, partname);
289 rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
290 ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
291
292 /*
293 * For properly dangerously dedicated disks (ones with a historical
294 * bogus partition table), the boot blocks will give slice = 4, but
295 * the kernel will only provide the compatibility slice since it
296 * knows that slice 4 is not a real slice. Arrange to try mounting
297 * the compatibility slice as root if mounting the slice passed by
298 * the boot blocks fails. This handles the dangerously dedicated
299 * case and perhaps others.
300 */
301 if (slice == COMPATIBILITY_SLICE)
302 return;
303 slice = COMPATIBILITY_SLICE;
304 sname = dsname(newrootdev, unit, slice, part, partname);
305 rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
306 ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
307}
308#endif
309
310#if defined(NFS) && defined(NFS_ROOT)
311#if !defined(BOOTP_NFSROOT)
312
313#include <sys/socket.h>
314#include <net/if.h>
315#include <net/if_dl.h>
316#include <net/if_types.h>
317#include <net/if_var.h>
318#include <net/ethernet.h>
319#include <netinet/in.h>
320#include <vfs/nfs/rpcv2.h>
321#include <vfs/nfs/nfsproto.h>
322#include <vfs/nfs/nfs.h>
323#include <vfs/nfs/nfsdiskless.h>
324
325extern struct nfs_diskless nfs_diskless;
326
327/*
328 * Convert a kenv variable to a sockaddr. If the kenv variable does not
329 * exist the sockaddr will remain zerod out (callers typically just check
330 * sin_len). A network address of 0.0.0.0 is equivalent to failure.
331 */
332static int
333inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
334{
335 u_int32_t a[4];
336 char *cp;
337
338 bzero(sa, sizeof(*sa));
339
340 if ((cp = kgetenv(ev)) == NULL)
341 return(1);
342 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
343 return(1);
344 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
345 return(1);
346 /* XXX is this ordering correct? */
347 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
348 sa->sin_len = sizeof(*sa);
349 sa->sin_family = AF_INET;
350 return(0);
351}
352
353static int
354hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
355{
356 char *cp;
357 u_int32_t a[6];
358
359 bzero(sa, sizeof(*sa));
360 sa->sdl_len = sizeof(*sa);
361 sa->sdl_family = AF_LINK;
362 sa->sdl_type = IFT_ETHER;
363 sa->sdl_alen = ETHER_ADDR_LEN;
364 if ((cp = kgetenv(ev)) == NULL)
365 return(1);
366 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
367 return(1);
368 sa->sdl_data[0] = a[0];
369 sa->sdl_data[1] = a[1];
370 sa->sdl_data[2] = a[2];
371 sa->sdl_data[3] = a[3];
372 sa->sdl_data[4] = a[4];
373 sa->sdl_data[5] = a[5];
374 return(0);
375}
376
377static int
378decode_nfshandle(char *ev, u_char *fh)
379{
380 u_char *cp;
381 int len, val;
382
383 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
384 return(0);
385 len = 0;
386 cp++;
387 for (;;) {
388 if (*cp == 'X')
389 return(len);
390 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
391 return(0);
392 *(fh++) = val;
393 len++;
394 cp += 2;
395 if (len > NFSX_V2FH)
396 return(0);
397 }
398}
399
400/*
401 * Populate the essential fields in the nfsv3_diskless structure.
402 *
403 * The loader is expected to export the following environment variables:
404 *
405 * boot.netif.ip IP address on boot interface
406 * boot.netif.netmask netmask on boot interface
407 * boot.netif.gateway default gateway (optional)
408 * boot.netif.hwaddr hardware address of boot interface
409 * boot.nfsroot.server IP address of root filesystem server
410 * boot.nfsroot.path path of the root filesystem on server
411 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
412 */
413static void
414pxe_setup_nfsdiskless(void)
415{
416 struct nfs_diskless *nd = &nfs_diskless;
417 struct ifnet *ifp;
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418 struct sockaddr_dl *sdl, ourdl;
419 struct sockaddr_in myaddr, netmask;
420 char *cp;
421
422 /* set up interface */
423 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
424 return;
425 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
426 kprintf("PXE: no netmask\n");
427 return;
428 }
429 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
430 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
431 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
432 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
433 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
434
435 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
436 kprintf("PXE: no hardware address\n");
437 return;
438 }
d7f50089 439 TAILQ_FOREACH(ifp, &ifnet, if_link) {
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440 struct ifaddr_container *ifac;
441
442 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
c8fe38ae 443 struct ifaddr *ifa = ifac->ifa;
27eaa4f1 444
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445 if ((ifa->ifa_addr->sa_family == AF_LINK) &&
446 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
447 if ((sdl->sdl_type == ourdl.sdl_type) &&
448 (sdl->sdl_alen == ourdl.sdl_alen) &&
449 !bcmp(sdl->sdl_data + sdl->sdl_nlen,
450 ourdl.sdl_data + ourdl.sdl_nlen,
451 sdl->sdl_alen))
452 goto match_done;
453 }
454 }
455 }
456 kprintf("PXE: no interface\n");
457 return; /* no matching interface */
458match_done:
459 strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
460
461 /* set up gateway */
462 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
463
464 /* XXX set up swap? */
465
466 /* set up root mount */
467 nd->root_args.rsize = 8192; /* XXX tunable? */
468 nd->root_args.wsize = 8192;
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469 nd->root_args.sotype = SOCK_STREAM;
470 nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT;
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471 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
472 kprintf("PXE: no server\n");
473 return;
474 }
475 nd->root_saddr.sin_port = htons(NFS_PORT);
476
477 /*
478 * A tftp-only loader may pass NFS path information without a
479 * root handle. Generate a warning but continue configuring.
480 */
481 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
482 kprintf("PXE: Warning, no NFS handle passed from loader\n");
483 }
484 if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
485 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
486
487 nfs_diskless_valid = 1;
488}
489
490#endif
491#endif